Overview

A class action lawsuit has been filed against Quanex Building Products Corporation (“Quanex” or the “Company”) and certain of the Company’s former senior executive officers alleging violations of the federal securities laws. The Company’s common stock trade on the New York Stock Exchange (“NYSE”) exchange under the symbol “NX.”

The Quanex class action lawsuit was brought on behalf of all persons and entities who purchased or otherwise acquired Quanex securities between December 12, 2024 and September 5, 2025, both dates inclusive, (the “Class Period”).

Quanex is an international supplier of engineered home components and access solutions to the construction industry, including windows, doors, cabinetry, and vinyl products. On August 1, 2024, Quanex announced it closed on its acquisition of Tyman, for an aggregate consideration of approximately $1.1 billion dollars. Tyman is a United Kingdom-based manufacturer of building components, including handles, hardware and sealing components for residential and commercial applications.

The lawsuit alleges that Defendants misled investors about Quanex’s business, operations, and prospects, particularly in connection with the integration of its Tyman window and door hardware business in Mexico. Defendants repeatedly issued positive statements about the Company’s growth and integration benefits, while failing to disclose serious operational deficiencies at the Tyman facility.

According to the lawsuit, the Company’s procedures and policies regarding tooling and equipment maintenance were significantly underinvested, leaving tooling and equipment in degraded conditions that executives later admitted were near “catastrophic” levels. These problems had been identified midyear during the integration process but were not disclosed to investors. Instead, Defendants continued to highlight expected synergies and benefits, without acknowledging that these same issues would incur significant costs and delay the realization of procurement savings tied to the Tyman integration.

The truth began to emerge on September 4, 2025, when Quanex announced its third-quarter financial results. The Company reported diluted EPS of ($6.04) compared to $0.77 in the prior year period, and an adjusted EBITDA of $70.3 million. The Company also admitted that operational issues at the Tyman Mexico facility impacted results “more than expected” and disclosed that it was adjusting guidance for lower expected volumes while delaying the timing of expected procurement savings.

On the following day, September 5, 2025, during an earnings call, CEO George Wilson further revealed that operational challenges in the Tyman facility had negatively impacted EBITDA by nearly $5 million in the quarter alone. He explained that systems to anticipate and plan for tooling repairs were “near nonexistent” and that underinvestment in tooling and equipment had forced the Company to make costly repairs to avoid catastrophic failures.

Following these disclosures, Quanex’s stock price fell $2.73, or 13.1%, on September 5, 2025, and continued to decline by another $1.98, or 10.9%, on September 8, 2025. The lawsuit alleges that, as a result of Defendants’ false and misleading statements and omissions, Class members purchased Quanex securities at artificially inflated prices and suffered significant losses when the truth was revealed.

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If you purchased or otherwise acquired Quanex securities between December 12, 2024 and September 5, 2025, both dates inclusive, and you wish to serve as lead plaintiff in this lawsuit, we encourage you to submit your information to DiCello Levitt LLP via the form on this page. 

You can also contact DiCello Levitt partner Brian O’Mara by calling (888) 287-9005 or at investors@dicellolevitt.com. 

The deadline to apply to the Court to serve as lead plaintiff in the Quanex class action lawsuit is November 18, 2025.